Eun Gye-hoon is a renowned chef who suddenly finds himself experiencing the emotions of a stranger, Noh Da-hyun. This phenomenon, known as a 'link,' causes him to spontaneously laugh, cry, and feel pain whenever Da-hyun does. As Gye-hoon navigates his successful career, he is drawn back to the neighborhood of Jihwa-dong, where his twin sister went missing twenty years ago, to uncover the truth behind the mysterious connection and the dark secrets of the town. Noh Da-hyun is a woman struggling with a series of unfortunate events, including a life-altering incident that forces her to cross paths with Gye-hoon. As their lives become inextricably linked, they must confront the trauma of the past and the dangerous reality of their present. The series blends elements of fantasy, romance, and thriller as the duo works to solve the cold case of the missing girl while navigating their growing feelings for one another.